A heat pipe includes an intermediate metal layer interposed between outermost metal layers, an inlet passage defined by opposing wall portions of the intermediate metal layer and the outermost metal layers, and a porous body provided at one or both of the wall portions. The porous body includes a first bottomed hole that caves in from one surface of the intermediate metal layer, a second bottomed hole that caves in from the other surface of the intermediate metal layer, and a pore formed by the first bottomed hole that partially communicates with the second bottomed hole. The outermost metal layers, the intermediate metal layer, the inlet passage, and the porous body form an inlet for filling a working fluid into the heat pipe.